Title :
Design of a novel digital phase shifter at X-band
Author :
Zhang Jin ; Ortiz, S. ; Mortazawi, A.
Author_Institution :
Dept. of Electr. & Comput. Eng., North Carolina State Univ., Raleigh, NC, USA
Abstract :
A novel digital phase shifter design at X-band is presented. The phase shift is realized by converting a microstrip line to a rectangular waveguide and thus switching the propagation constant of the line. A 3-bit phase shifter has been constructed using passive components in lieu of diode switches for theoretical verification. For this design a maximum insertion loss of 1.4 dB at 11 GHz was achieved. The size of the 3-bit phase shifter is 1.2/spl times/0.3 inch/sup 2/. In addition, a 90 degree phase shifter has been built using PIN diodes as switches, giving an insertion loss of 0.9 dB at 11 GHz with the size of 0.24/spl times/0.26 inch/sup 2/.
Keywords :
losses; microstrip lines; microwave phase shifters; p-i-n diodes; rectangular waveguides; semiconductor switches; waveguide transitions; 0.9 dB; 1.4 dB; 11 GHz; X-band; digital phase shifter; diode switches; maximum insertion loss; microstrip line-rectangular waveguide conversion; passive components; propagation constant; Diodes; Insertion loss; Microstrip; Phase shifters; Propagation constant; Rectangular waveguides; Switches; Transmission line theory; Waveguide discontinuities; Waveguide transitions;
Conference_Titel :
Microwave Symposium Digest, 2001 IEEE MTT-S International
Conference_Location :
Phoenix, AZ, USA
Print_ISBN :
0-7803-6538-0
DOI :
10.1109/MWSYM.2001.966877
